KR20100107077A - Multiplexing over i and q branches - Google Patents

Abstract

Systems and methods are presented that facilitate transmitting and receiving signals over an I and Q branch of a communication channel to mitigate potential I / Q imbalance. In particular, the device may transmit signals through the I and Q branches to distribute the transmit power substantially uniformly for a given channel. Such an apparatus may demodulate the data into a code or matrix with real and complex modifiers resulting in I and Q branch signals for transmission. If the channel has multiple resources, such a device can alternately or transmit over the I branch in one resource and over the Q branch in another resource to distribute power. In addition, such an apparatus may apply a complex scrambling code to distribute the signal across both the I and Q branches. Such an apparatus may also use QPSK or higher order modulation scheme to transmit the intended signals to the same user.

Description

Multiplexing over I and J branches {MULTIPLEXING OVER I AND Q BRANCHES}

This application discloses US Provisional Application No. 61 / 027,143, filed Feb. 8, 2008, entitled "METHODS OF MULTIPLEXING USERS SHARING THE SAME RESOURCE", and US Provisional Application No. 61 / 034,227, filed March 6, 2008, entitled " METHODS OF MULTIPLEXING USERS SHARING THE SAME RESOURCE ". The above applications are hereby incorporated by reference in their entirety.

FIELD OF THE INVENTION The present invention generally relates to wireless communication, and more particularly to multiplexing multiple device communications on one or more shared resources.

Wireless communication systems are widely used to provide various communication services such as, for example, voice, data, and the like. Typical wireless communication systems can be multiple access systems that can support communication with multiple users by sharing available system resources (eg, bandwidth, transmit power, etc.). Examples of such multiple access systems include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal frequency division multiple access (OFDMA) systems. In addition, these systems can be multiplied, such as third generation partnership projects (3GPP), 3GPP Long Term Evolution (LTE), ultra mobile broadband (UMB), and / or evolution data optimized (EV-DO), one or more EV-DO revisions. Carrier radio standards can be followed.

In general, a wireless multiple-access communication system can simultaneously support communication for multiple communication terminals. Each mobile device can communicate with one or more base stations via transmissions on the forward and reverse links. The forward link (or downlink) refers to the communication link from base stations to mobile devices, and the reverse link (or uplink) refers to the communication link from mobile devices to base stations. In addition, communications between mobile devices and base stations may be established through a single input single output (SISO), multiple input single output (MISO), multiple input multiple output (MIMO) system, and the like. In addition, mobile devices can communicate with other mobile devices (and / or base stations with other base stations) in a peer to peer wireless network configuration.

In wireless communication, devices can transmit and receive signals on shared resources. For example, one or more multiplexing techniques, such as frequency division multiplexing (FDM), time division multiplexing (TDM), code division multiplexing (CDM), orthogonal FDM (OFDM), and the like, may be used to combine the signals on the resource. Devices may use binary phase shift keying (BPSK) to achieve orthogonality for one or more resources, and may use in-phase / quadrature (I / Q) multiplexing to expand resource capacity. This preferably increases the number of supported signals for resources to improve communication throughput for the resources and associated wireless communication network. However, the substantial difference in transmit power for the I and Q branches can result in I / O imbalance, which can cause undesirable results when demultiplexing the received signals.

The following description provides a simplified description of one or more embodiments in order to provide a basic understanding of embodiments of the invention. This section is not intended to be a comprehensive overview of all possible embodiments, nor is it intended to identify key elements of all elements or to cover the scope of all embodiments. Its sole purpose is to present the concept of one or more embodiments in a simplified form as a prelude to the more detailed description that is presented later.

In accordance with one or more embodiments and corresponding descriptions thereof, in-phase / quad phase (I / Q) multiplexing on both the I and Q branches to transmit one or more individual signals and to more evenly distribute the transmit power. Various aspects related to the use are presented. In one example, a portion of a given signal may be sent over the I branch and the remaining signal may be sent over the Q branch. In this regard, the transmit power for a given signal is substantially similar for both I and Q branches. In another example, a signal that is repeated many times may alternate between transmissions on the I and Q branches in one or more iterations to provide more balanced I / Q multiplexing.

According to a related aspect, a method is provided for modulating data for in-phase / quad phase (I / Q) multiplexing. The method may include receiving configuration information related to a wireless communication channel. The method may also include modulating data into one or more signals in accordance with the configuration information and transmitting the signals over an I and Q branch of the communication channel.

Another aspect relates to a wireless communication device. The wireless communications apparatus can include at least one processor configured to generate a transmission signal based at least in part on the received data and to distribute the signal over I and Q branches of a communication channel. The processor is further configured to transmit the signal over the communication channel using the I and Q branches. The wireless communication device also includes a memory coupled to the at least one processor.

Another aspect relates to a wireless communication device that facilitates mitigating I / Q imbalance in transmitting wireless communication signals. The wireless communications apparatus can include means for generating a signal based at least in part on data to be transmitted and means for distributing the signal over an I and Q branch of a communication channel. The wireless communication device may further comprise means for transmitting signals of the I and Q branches of the communication channel.

Another aspect relates to a computer program product comprising a computer readable medium comprising code for causing at least one computer to determine configuration information related to a communication channel. The computer readable medium may also include code for causing the at least one computer to modulate data into one or more signals divided over the I and Q branches of the communication channel. The computer readable medium may also include code for causing the at least one computer to transmit the signals on the I and Q branches of the communication channel.

Further aspects relate to the device. The apparatus may include a channel resource determiner for receiving configuration information related to one or more communication channels. The apparatus further includes a data modulator for generating a signal for transmission through the I branch of the channel and a signal for transmission through the Q branch of the channel based at least in part on the configuration information and the signals through the I and Q branches. It may include a transmitter for transmitting.

According to a further aspect, a method is provided that facilitates evaluating communication channels based on a signal multiplexed across an I and Q branch. The method includes receiving multiplexed signals from a plurality of wireless devices related to a communication channel and separating the multiplexed signals into portions received at an I branch and portions received at a Q branch. The method also includes demodulating some portions received at the I branch and some portions received at the Q branch to generate data transmitted by one of the plurality of wireless devices over the communication channel. .

Another aspect relates to a wireless communication device. The wireless communication device receives a multiplexed signal from a plurality of wireless devices over a communication channel, and is transmitted over an I and Q branch of the communication channel, each of which is associated with at least one of the plurality of wireless devices. And at least one processor configured to demultiplex the multiplexed signal to determine signals of. The processor is further configured to demodulate at least one signal transmitted through the I branch and at least one signal transmitted through the Q branch to determine data transmitted by at least one of the plurality of wireless devices. . The wireless communication device also includes a memory coupled to the at least one processor.

Another aspect relates to a wireless communication device for receiving I / Q multiplexed signals. The wireless communications apparatus can include means for receiving multiplexed signals related to a communication channel via an I and Q branch. The wireless communication device may further comprise means for demultiplexing the multiplexed signals for the I and Q branches and for receiving data transmitted by the device to generate a plurality of signals from the device transmitted through the branches. Means for demodulating at least one device signal from the I branch and at least one device signal from the Q branch.

Another aspect relates to a computer program product that may include a computer readable medium comprising code for causing at least one computer to receive multiplexed signals from a plurality of wireless devices associated with a communication channel. The computer readable medium may also include code for causing the at least one computer to separate the multiplexed signal into a portion received at an I branch and a portion received at a Q branch. In addition, the computer readable medium causes the at least one computer to perform some portion received at the I branch and the Q branch to generate data transmitted by one of the plurality of wireless devices over the communication channel. May include a code for demodulating some portion received at.

Further aspects relate to the device. The apparatus includes a receiver for receiving multiplexed signals from a plurality of wireless devices related to the communication channel and a demultiplexer for demultiplexing the I and Q branches of the communication channel to yield a plurality of signals transmitted in both I and Q branches. It may include. The device further demodulates at least one of the plurality of signals transmitted in the I branch and at least one of the plurality of signals transmitted in the Q branch to determine data transmitted by one of the plurality of devices. It may include a demodulator.

To the accomplishment of the foregoing and related ends, one or more embodiments are described below and particularly include the features specified in the claims. The following description and the annexed drawings set forth in detail certain illustrative aspects of these embodiments. These aspects are indicative, however, of but a few of the various ways in which the principles of various embodiments may be employed, and the embodiments presented are intended to include both such embodiments and their equivalents.

1 is a diagram illustrating an example of a wireless communication system in accordance with various aspects set forth herein.
2 shows an example of an exemplary apparatus for modulating signals on I and Q branches to mitigate I / Q imbalance.
3 illustrates an example communication device for use within a wireless communication environment.
4 is a diagram illustrating an example of an example wireless communication system for transmitting and receiving signals on an I and Q branch.
5 shows an example of an exemplary method for facilitating transmitting signals on I and Q branches in accordance with received configuration information.
6 shows an example of an exemplary method that facilitates processing signals received on I and Q branches.
7 is a diagram illustrating an example of an exemplary mobile device that modulates and / or scrambles signals to be transmitted on I and Q branches.
8 shows an example of an example system for receiving signals transmitted on I and Q branches and assigning channel configurations.
9 is a diagram illustrating an example of an example wireless network environment that may be used in the various systems and methods presented herein.
10 is a diagram illustrating an example system for mitigating I / Q imbalance by distributing signal transmissions over I and Q branches.
FIG. 11 shows an example of an example system for receiving signals transmitted on I and Q branches and determining device data from these signals.

Various embodiments are now described with reference to the drawings, wherein like reference numerals are used throughout the drawings to refer to like elements. In the following description, for purposes of explanation, various descriptions are set forth in order to provide an understanding of the present invention. It is evident, however, that such embodiments may be practiced without these specific details. In other instances, well-known structures and devices are shown in block diagram form in order to facilitate describing the embodiments.

The terms "component," "module," system, "and the like, as used herein, refer to a computer-related entity, hardware, firmware, software, combination of software and hardware, or execution of software. For example, a component may be, but is not limited to, a process executing on a processor, a processor, an object, an executing thread, a program, and / or a computer. For example, both an application running on a computing device and the computing device can be a component. One or more components may reside within a processor and / or thread of execution, one component may be localized within one computer, or it may be distributed between two or more computers. Further, such components may execute from various computer readable media having various data structures stored therein. The components may be, for example, a signal (e.g., a local system, data from one component interacting with another component in a distributed system, and / or data over a network, such as the Internet, Lt; RTI ID = 0.0 > and / or < / RTI >

Also, various embodiments are described in connection with a mobile device. A mobile device may be referred to as a system, subscriber unit, subscriber station, mobile station, mobile, remote station, access point, remote terminal, access terminal, user terminal, user agent, user device, or user equipment. The mobile device may be a subscriber station, wireless device, cellular telephone, PCS telephone, cordless telephone, session initiation protocol (SIP) telephone, wireless local loop (WLL) station, personal digital assistant (PDA), portable device with connectivity capabilities, or It may be another processing device connected to a wireless modem. Also, various embodiments are described in connection with a base station. A base station may be used to communicate with mobile device (s) and may be referred to as an access point, Node B, evolved Node B (eNode B or eNB), base station transceiver station (BTS), or other terminology.

In addition, the various aspects or features presented herein may be embodied in a method, apparatus, or article of manufacture using standard programming and / or engineering techniques. The term "article of manufacture" includes a computer program, carrier, or media accessible from any computer readable device. For example, computer readable media may include magnetic storage devices (eg, hard disks, floppy disks, magnetic strips, etc.), optical disks (eg, CDs, DVDs, etc.), smart cards, and flash memory devices. (Eg, EEPROM, card, stick, key drive, etc.), but is not limited to these. In addition, various storage media presented herein include one or more devices and / or other machine-readable media for storing information. The term "machine-readable medium" includes, but is not limited to, wireless channels and various other media capable of storing, holding, and / or transferring instruction (s) and / or data.

The techniques presented here include code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal frequency division multiple access (OFDMA), single carrier frequency domain multiplexing (SC-FDMA), and other systems. It can be used in various wireless communication systems such as. The terms "system" and "network ", as used herein, are often used interchangeably. CDMA systems implement wireless technologies such as Universal Terrestrial Radio Access (UTRA), cdma2000, and the like. UTRA includes wideband-CDMA (WCDMA) and low chip rate (LCR). Cdma2000 also includes IS-2000, IS-95, and IS-856 standards. The TDMA system implements a radio technology such as General Purpose System for Mobile Communications (GSM). OFDMA systems implement wireless technologies such as Evolved UTRA (E-UTRA), Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash OFDM®, and the like. UTRA and E-UTRA are part of the Universal Mobile Communication System (UMTS). 3GPP Long Term Evolution (LTE) is the next release of UMTS using E-UTRA, which uses OFDMA in the downlink and SC-FDMA in the uplink. UTRA, E-UTRA, GSM, UMTS and LTE are presented in the documents of the " Third Generation Partnership Project (3GPP) ". Cdma2000 and UMB are also presented in the documents of "3rd Generation Partnership Project 2" (3GPP2). The techniques presented herein may be used in an evolution data optimized (EV-DO) standard such as, for example, 1xEV-DO revision B or other revisions. In addition, these wireless communication systems additionally include peer-to-peer (eg, mobile-to-mobile) ad hoc networks that often use unpaired unlicensed spectrums, 802.xx wireless LAN, BLUETOOTH, and any short-range or long-range wireless communication technologies. It may include.

Various aspects or features will be presented in terms of systems that may include a number of devices, components, modules, and the like. It should be understood that various systems may include additional devices, components, modules, etc., and / or may not include all of the devices, components, modules, etc., shown in the figures. Combinations of these methods can also be used.

Referring now to FIG. 1, a wireless communication system 100 in accordance with various embodiments presented herein is presented. The system 100 includes a base station 102 that may include multiple antenna groups. For example, one antenna group may include antennas 104 and 106, another group may include antennas 108 and 110, and additional groups may include antennas 112 and 114. . Two antennas are presented for each antenna group; However, more or fewer antennas may be used for each group. Base station 102 may also include a transmitter chain and a receiver chain, each of which may be associated with a number of components (eg, processor, modulator, multiplexer, demodulator, demultiplexer) associated with signal transmission and reception, as will be appreciated by those skilled in the art. , Antennas, etc.).

Base station 102 may communicate with one or more mobile devices, such as mobile device 116 and mobile device 122; However, it will be appreciated that it can communicate with virtually any number of mobile devices similar to mobile devices 116 and 122. Mobile devices 116 and 122 are, for example, for communicating via cellular telephones, smartphones, laptops, portable communication devices, portable computing devices, satellite radios, GPS, PDAs, and / or wireless communication systems 100. It may be any other device suitable. As shown, mobile device 116 communicates with antennas 112 and 114, antennas 112 and 114 transmit information to mobile device 116 via forward link 118, and reverse link ( Information is received from mobile device 116 via 120. In addition, mobile device 122 communicates with antennas 104 and 16, and antennas 104 and 106 transmit information to mobile device 122 over forward link 124 and move over reverse link 126. Receive information from device 122. In a frequency division duplex (FDD) system, for example, the forward link 118 may use a different frequency band than that used in the reverse link 120, and the forward link 124 is used by the reverse link 126. You can use a different frequency band. Further, in a time division duplex (TDD) system, forward link 118 and reverse link 120 may use a common frequency band, and forward link 124 and reverse link 126 may use a common frequency band.

Each group of antennas and / or the area in which they are designated to communicate may be referred to as a sector of base station 102. For example, antenna groups may be designated to communicate with mobile devices residing within a sector of the areas covered by base station 102. In communication on forward links 118 and 124, the transmit antennas of base station 102 perform beamforming to improve the signal-to-noise ratio of forward links 118 and 124 for mobile devices 116 and 122. It is available. In addition, while base station 102 uses beamforming for transmission to mobile devices 116 and 122 that are randomly distributed across associated coverage, mobile devices in neighboring cells use a single antenna to transmit all their mobile devices. You may experience less interference as compared to the base station transmitting it. In addition, mobile devices 116 and 122 may communicate directly with each other using peer to peer or ad hoc technology (not shown).

According to one example, system 100 may be a multiple input multiple output (MIMO) system. In addition, the system 100 may use substantially any type of duplexing technique to partition communication channels (eg, forward link, reverse link, etc.), such as FDD, FDM, TDD, TDM, CDM, and the like. have. In addition, the communication channels may be orthogonal to allow simultaneous communication with multiple devices on the channels: In one example, OFDM may be used in this regard. Mobile devices 116 and 122 are one using binary phase shift keying (BPSK), quadrature phase shift keying (QPSK), M-phase-shift keying (M-PSK), etc. to ensure orthogonality on the channels. Data may be modulated into one or more communication signals over the communication channel. Mobile devices 116 and 122 multiplex the modulated signals, for example using in-phase / quad phase (I / Q) multiplexing, and transmit the signals to base station 102 and / or another base station (not shown). Can be. This I / Q multiplexing increases communication channel capacity by allowing communication through each of two branches that are rotated with respect to each other to mitigate interference. However, signals transmitted over I and Q branches may experience interference from other branches due to an imbalance in the transmit power of the signals through the branch.

To mitigate I / Q imbalance, mobile devices 116 and 122 can multiplex given modulation signals such that at least one signal is transmitted through both I and Q branches. In one example, mobile devices 116 and 122 may transmit some of the modulated signals (eg, substantially half of the signal) via I branch, and transmit the remaining portion via the corresponding Q branch. . This evens out power to the branches. In another example where a modulated signal is transmitted in a signal group, the signals in the group may alternate between the I and Q branches in multiple transmissions. It will be appreciated that signals from base station 102 may similarly be modulated and / or multiplexed. In addition, mobile devices 116 and / or 122 or base station 102 may communicate with similar devices in peer to peer or ad hoc mode using the multiplexing and / or modulation functions presented herein as described above.

Referring now to FIG. 2, a system 200 is presented that facilitates distributing data over I and Q branches for subsequent transmissions. System 200 includes a modulator 202 that prepares data for transmission as a signal over a wireless communication network. As shown, the modulator 202 may receive data to be sent as input along with channel configuration information. The channel configuration information may include, for example, channel resources allocated by the wireless device, information about data transmission over the channel (e.g., code for modulating, scrambling, and / or multiplexing data, transmission intervals, repetition / requests). Information) and / or the like. Depending on the channel configuration information, modulator 202 may distribute data onto the I and Q branches of the associated antenna (not shown) for transmission.

The received channel configuration information may define one or more instructions for distributing data over the I and Q branches. In one example, the channel configuration information may be codes or matrices (eg, orthogonal or quasi-orthogonal codes (eg, including Walsh codes), M matrices, and / or other code with good correlation characteristics). / Matrices). It will be appreciated that quasi-orthogonal codes may refer to code matrices whose rows or columns are orthogonal, or any other set of codes having partial orthogonality. The modulator 202 may use the codes to convert the data into a signal for transmission. In one example, when applied to the data, the codes may generate a signal on the I branch and a signal rotated 90 degrees with respect to the Q branch. In one example, the code may facilitate generating a signal such that half of the signal power associated with the data is in the I branch and the other half is in the Q branch. This may mitigate I / Q imbalance, as shown.

In another example, the channel configuration information may relate to providing a repeated signal such that the signal generated by the modulator 202 may be transmitted multiple times. This may occur, for example, in an automatic repeat / request (ARQ) configuration, a hybrid ARQ (HARQ) configuration, etc., where there may be multiple partial time and frequency resources, such as control channel elements (CCEs), for a given channel. That is, in one example, according to the channel configuration information, the modulator 202 may transmit a signal through the I branch and repeat the signal through the Q branch. It will be appreciated that two or more iterations may be defined by the above configuration, and in one example the signal may alternate between the I and Q branches or transmit at least once in each branch. Also, for example, the channel configuration information may be applied to applying a complex scrambling code to ensure that at least a portion of the transmission of the signal is through the Q branch and vice versa when the signal has been previously scheduled for I branch transmission. May be related. In addition, in one example, modulator 202 may support communication with an apparatus using multiple transport blocks over MIMO channels, such as an uplink single-user (SU) MIMO channel. In this regard, the modulator 202 is coupled to each of a plurality of physical HARQ indicator channels (PHICHs) via at least one I and at least one Q branch to mitigate I / Q imbalance in supporting the SU-MIMO channel. Related signals can be modulated.

로 곱해짐) 월쉬 코드들을 추가함으로써 8개의 신호들을 지원하도록 확장될 수 있다. Referring now to FIG. 3, a wireless communication device 300 for use in a wireless communication environment is presented. The communication device 300 may be a base station device or part of a base station device, a mobile device or part of a mobile device, or substantially any communication device that receives data transmitted in a wireless communication environment. The communication device 300 includes a channel resource allocator 302 that assigns one or more channel resources to one or more wireless devices (not shown) and a signal receiver 304 that receives one or more signals transmitted by the one or more wireless devices. It may include. In previous solutions, the signal has been multiplexed such that each wireless device or associated user transmits data through either the I or Q branch of the channel. Thus, each wireless device or associated user has been assigned a multiplexing configuration using Walsh codes for transmission over a signal channel branch (eg, an I or Q branch). The Walsh code may refer to an orthogonal code assigned to data or signals that define communication channels. For example, Walsh codes for a channel supporting four signals may be transmitted over the I branch [1 1 1 1], [1 -1 1 -1], [1 1 -1 -1], and [1 -1 -1 1]. Thus, a channel is applied with a 90 degree phase rotation that can be transmitted through a Q branch (e.g. imaginary j =

It can be extended to support eight signals by adding Walsh codes.

In accordance with the present invention presented herein, channel resource allocator 302 is configured to multiplex with wireless devices such that a given wireless device transmits some of the associated signals (half of the signal) over the I branch and the remaining portions over the Q branch. Can be assigned. In this regard, the transmit power may be substantially similar across the branches. In one example, this may be accomplished by using a modified Walsh code, an M matrix, or substantially any matrix with good correlation characteristics, as shown below. For example, if Walsh codes are used to multiplex the symbols, the codes may have I and Q branch modifiers, respectively. Thus, for example, Walsh codes for a channel supporting eight signals using I / Q multiplexing are not only the aforementioned codes multiplied by j, but also [1 1 j j ], [1 -1 j - j ], [1 1 -j -j ], [1 -1- jj ]. Thus, in this example, channel resource allocator 302 can assign one or more of the channels, and corresponding Walsh codes, to the wireless devices. The signal receiver 304 can then receive signals from the wireless devices over the channels according to the assigned Walsh codes and demultiplex these signals with minimal I / Q imbalance, since the codes can be given a given channel signal. This is because it causes transmission over the I and Q branches for. In another example, signals may be distributed over CCEs, or other part time and frequency resources of the channel; In this regard, the channel resource allocator 302 may assign CCEs such that the wireless device can transmit signals via alternating CCEs between the I and Q branches for a given signal. In another example, channel resource allocator 302 may specify a complex scrambling code to use for signal encoding; This code can cause a signal to be sent on the I and Q branches.

Referring now to FIG. 4, a wireless communication system is provided that facilitates communication using distributed I / Q multiplexed signals. Wireless devices 402 and / or 404 may be mobile devices (eg, including modems as well as independently powered devices), base stations, and / or portions thereof. In one example, the wireless devices 402 and 404 can communicate using peer to peer or ad hoc technology when the wireless devices 402 and 404 are of similar type. In addition, system 400 may be a MIMO system and / or may conform to one or more wireless network system specifications (eg, EV-DO, 3GPP, 3GPP2, 3GPP LTE, WiMAX, etc.). Furthermore, in one example, the components and functions of the wireless device 402 presented and described below may also exist in the wireless device 404 and vice versa; The configuration presented excludes these components for convenience of description.

The wireless device 402 includes a channel resource determiner 406 capable of obtaining information related to communicating over communication channels, a modulator 408 capable of modulating data with one or more signals to be transmitted over the communication channel, during transmission A signal scrambler 410 capable of applying a scrambling sequence encoding the message to one or more signals for protection, and a transmitter 412 capable of transmitting signals via the wireless communication system 400. The wireless device 404 is a channel resource allocator 414 that can assign communication channel resources to one or more wireless devices, such as the wireless device 402, and a receiver 416 that can receive one or more signals from one or more wireless devices. ), A descrambler 418 that can reverse the scrambling code applied to the received signal, a demultiplexer 420 that can demultiplex the received signal into one or more individual signals, and the data carried by the signal. A demodulator 422 may be included that can demodulate the signal to produce. It should be understood that one or more of the components in the wireless devices 402 and 404 may be optional. For example, the signal scrambler 410 may not exist or may not be used by the wireless device 402, and the presence or use of the descrambler 418 of the wireless device 404 may be the signal scrambler 410 present. Whether and / or are utilized.

According to one example, the wireless device 402 can distribute the signals over the I and Q branches to facilitate substantially balanced I / Q multiplexing, as presented herein. In one example, channel resource determiner 406 may obtain relevant configuration information for the transmission of signals over one or more channel resources and / or one or more channel resources. This may be hardcoded within the wireless device 402, may be received from one or more network components, may be received from the channel resource allocator 414, and / or the like. The configuration information may relate to transmitting signals on the I and Q branches of the communication channel. In one example, the information can be one or more Walsh codes, or other orthogonal or quasi-orthogonal codes, for modulating the data, where at least one Walsh code has I and Q portions, such that modulation of the data is on the I branch. Results in some of the modulated data and some of the modulated data on the Q branch, as described above.

In one example, channel resource allocator 414 may define and assign channel resources and / or modulation data for various wireless devices to support sharing a channel between multiple signals and thus devices. . For example, channel resource allocator 414 may use the following matrix of Walsh codes that assign each device to one column to provide orthogonal modulation of data on the I and Q branches:

About the I branch,

About the Q branch,

Thus, each code represented by a column, which can be assigned to one device, applies I and Q branch characteristics to equalize the signal for both branches. In this example, eight channels may be grouped for transmission as a signal from various wireless devices, including wireless device 402, to wireless device 404. It will be appreciated that more or fewer channels may be similarly grouped. For example, if one channel contains four groups, the following codes may be used:

About the I branch,

About the Q branch,

In one example, the channel may be a control channel, such as a PHICH. In addition, the channel may be associated with multiple control channels, such as multiple PHICHs to support uplink SU-MIMO communication using multiple transport blocks. In this example, multiple PHICHs may be related to a single wireless device, such as wireless device 404, each of which may be on I and Q branches to mitigate imbalances when delivering multiple PHICHs to the wireless device. Can transmit In addition, the channel Walsh codes may be configured based on the cyclic prefix (CP) associated with the channel (e.g., a PHICH using a normal CP may use 8 code groupings, and a PHICH using an extended CP is 4 Code groupings are available).

The channel resource determiner 406 may allocate resource allocation to the wireless device 404 (eg, including one or more orthogonal or quasi-orthogonal codes (eg, Walsh codes), for example, to transmit signals over the channel). Channel resource allocator 414. In this example, the data modulator 408 can distribute the data across the I and Q branches of the channel using the codes provided to generate one or more signals for transmission. In one example, signal scrambler 410 can apply a scrambling code to the signal, and transmitter 412 can transmit the scrambled signal. The wireless device 404 may receive a signal along with one or more signals from / to separate wireless devices via I and Q branches, which are in one example by the devices in modulating the data into a signal. It may appear as a multiplexed signal based on the codes used.

For example, receiver 416 may receive the multiplexed signal, and if descrambled, descrambler 418 may descramble the signal. Demultiplexer 420 may demultiplex the signal into signals transmitted by / to the devices. In one example, demultiplexer 420 may evaluate signals received in both the I and Q branches to determine the signals transmitted by / for separate devices, such as wireless device 402. For example, a signal received over I and Q branches can be expressed as follows:

는 I 브랜치에서 각 채널을 통해 전송되는 신호들의 벡터이며,

는 Q 브랜치에서 각 채널을 통해 전송되는 신호들의 벡터이며,

은 2개의 브랜치들 모두에서 각 채널을 통한 잡음을 나타내는 벡터이다. 이러한 예에서, M개의 톤들이 존재하는 경우, 2M개의 채널 그룹들이 I 및 Q 브랜치들에 걸쳐 균등하게 분산된다. 따라서, 디멀티플렉서(420)는 채널 추정을 벡터

에 적용할 수 있다. 일 예에서, I 및 Q 브랜치를 구분하는 경우, 다음은 각 브랜치에서의 신호들을 나타낼 수 있다:Where M is the number of channels that can be processed separately in each branch, h is the channel gain for the Mx1 grid, w is the Walsh code,

Is the vector of signals transmitted on each channel in branch I,

Is a vector of signals transmitted through each channel in the Q branch,

Is a vector representing noise through each channel in both branches. In this example, when there are M tones, 2M channel groups are evenly distributed across the I and Q branches. Thus, demultiplexer 420 vector the channel estimates.

Applicable to In one example, when distinguishing between I and Q branches, the following may represent the signals in each branch:

에 대한 디멀티플렉서(420)를 이용한 역확산은 첫 번째 M개의 PHICH에 대해 원하는 신호를 생성하고,

에 대한 역확산은 나머지 M개의 PHICH 신호들을 생성한다. 일단 신호들이 역확산 되면, 복조기(422)는 예를 들어 전술한 사용된 직교 또는 준-직교 코드(예를 들면, 월쉬 코드)에 기반하여 신호들로부터 데이터를 생성할 수 있다. 이는 분산(distribution)에 대한 단지 일 예일 뿐임을 이해하여야 한다; 예를 들어, 분산은 전술한 바와 같이 고르게 나눠질 필요가 없다. 월쉬 코드들이 사용될 필요가 없을 수도 있음을 이해하여야 한다; 오히려, 예를 들어, M 매트릭스, 또는 양호한 상관 특성들을 갖는 실질적으로 임의의 매트릭스가 이와 관련하여 역시 사용될 수 있다. therefore,

Despreading with demultiplexer 420 for C generates a desired signal for the first M PHICHs,

Despreading for produces the remaining M PHICH signals. Once the signals are despread, demodulator 422 can generate data from the signals, for example based on the used orthogonal or quasi-orthogonal code (eg, Walsh code) described above. It should be understood that this is only one example of distribution; For example, dispersion does not need to be divided evenly as described above. It should be understood that Walsh codes may not need to be used; Rather, for example, an M matrix, or substantially any matrix with good correlation properties, may also be used in this regard.

In another example, the configuration information received at the channel resource determiner 406 may be related to alternating transmissions of signals that are repeated such that at least one transmission is in the I branch and at least one transmission is in the Q branch. For example, if the channel over which the signal is transmitted provides for repetitive transmission of the signal (eg, two or more CCEs per channel), the data modulator 408 may be on the I branch for one transmission and for subsequent transmissions. On the Q branch, desired data can be modulated into a signal. This effectively equalizes the transmit power for the entire transmission of the signal over the I and Q branches in one example. Similarly, in the previous example, signal scrambler 410 may encode the signal for security, transmitter 412 may transmit the signal, and the transmitted signal may be received at receiver 416. When scrambled by scrambler 410, descrambler 418 can descramble the signal, and demultiplexer 420 demultiplexes the received signals (eg, using existing methods in this example). You can flex. The demodulator 422 may then reverse the Walsh code applied to determine the data transmitted by the device, such as the wireless device 402.

Also, in one example, the configuration information received from the channel resource determiner 406 may relate to using a complex scrambling code for the signal such that the final signal is on the I or Q branch. For example, the data modulator 408 may modulate the data on the I branch to generate a signal for transmission over the I branch. The signal scrambler 410 may apply a complex scrambling code that generates some or substantially all of the signal transmitted by the transmitter 412 over the Q branch. Dispersion of the signal is also possible in this regard to equalize or distribute the transmit power over the I and Q branches to mitigate I / Q imbalance. In this case, receiver 416 may receive I and Q branch signals, descrambler 418 may descramble the received signal using a complex scrambling code, and demultiplexer 420 may demodulate 422. You can separate the individual signals from the I and Q branches. As shown, demodulator 422 may determine data to be transmitted in a signal based on a code, such as a Walsh code used to spread data across the signal. Substantially any function is possible for modulating the signal on the I and Q branches; The foregoing descriptions are merely some examples.

5-6, methods related to transmitting and receiving signals using I / Q multiplexing while alleviating I / Q imbalance are presented. For simplicity of explanation, the methods are presented as a series of acts, but the methods are not limited to the order of such acts, and in accordance with one or more embodiments, some acts are in a different order and / or other acts than presented herein. It should be understood that it may occur at the same time. For example, those skilled in the art will appreciate that one method could alternatively be represented as a series of interrelated states or events, for example in a state diagram. Moreover, not all illustrated acts may be required to implement a methodology in accordance with one or more embodiments.

Referring to FIG. 5, a method 500 is provided that facilitates mitigating I / Q imbalance in transmission over a wireless communication channel. At 502, configuration information related to a wireless communication channel is received. For example, as shown, the configuration information may include one or more codes or matrices (e.g. Walsh codes) with good correlation properties to facilitate orthogonal communication of signals over the channel, complex scrambling codes, multiple CCE channels. To a transmission standard for the network. In this regard, the configuration information may relate to sending a portion of the signal over the I branch and transmitting the portion over the Q branch. At 504, data may be modulated into one or more signals in accordance with configuration information to mitigate I / Q imbalance, as previously presented. For example, if the configuration information includes Walsh codes, these codes may have real and complex elements, such that modulation using these codes will generate I and Q signals for a given set of data. Also, in one example, when the configuration information relates to the scrambling code, some of the signal may be scrambled on the I branch and some may be scrambled on the Q branch, as shown. At 506, signals may be sent over the I and Q branches of the communication channel. For example, it may evenly distribute the associated transmit power to mitigate I / Q imbalance.

Referring to FIG. 6, a method 600 is provided that facilitates receiving data transmitted over I and Q branches to mitigate I / Q imbalance. At 602, a multiplexed signal may be received for / from a plurality of wireless devices related to a communication channel. For example, the multiplexed signals can include a plurality of signals transmitted to / by various wireless devices over a communication channel. As shown, for example, codes and / or matrices with good correlation characteristics can be used to modulate the data to achieve the aforementioned purpose. At 604, the multiplexed signal may be separated into a portion received over an I branch and a portion received over a Q branch. In one example, the Q branch may be rotated 90 degrees relative to the I branch to allow additional orthogonal transmission to the branches. At 606, the portion received over the I branch and the portion received over the Q branch may be demultiplexed into a plurality of signals that could be transmitted to / by the plurality of wireless devices. At 608, the demultiplexed signal from both I and Q branches may be demodulated to determine, for example, data transmitted over a communication channel for a given wireless device. Thus, data is transmitted using both branches to mitigate I / Q imbalance.

In accordance with one or more aspects set forth herein, inference may be associated with determining the code to use to modulate the data, the code used to encode the data, the iteration scheme for transmitting data through the I and Q branches in different CCEs, and the like. Can be done. As used herein, the term “inference” is generally captured through events and / or data to reason or infer the state of a system, environment, and / or user from a set of observations. Refers to a process. Inference can be employed to identify a specific context or action, or can generate a probability distribution over states, for example. The inference can be probabilistic-that is, calculation of probability based on consideration of data and events, or in the context of uncertainty of user objectives and intentions, building probabilistic reasoning, and displaying the best expected use. It may be a theoretical decision to consider the actions. Inference can also refer to techniques employed for composing higher-level events from a set of events and / or data. Such inference, whether or not events correlate in close proximity in time, and whether the events and data are from one or several events and data sources, the set of observed events and / or stored event data Get a configuration of new events or actions from

7 shows an example of a mobile device 700 that facilitates transmitting signals over the I and Q branches of a channel. Mobile device 700 receives, for example, one or more signals across one or more carriers from a receive antenna (not shown) and performs typical operations (e.g., filtering, amplifying, downconverting, etc.) on the received signals. And a receiver 702 that digitizes the conditioned signals to perform samples. Receiver 702 can include a demodulator 704 that can demodulate received symbols and provide them to a processor 706 for channel estimation. Processor 706 is a processor dedicated to analyzing information received by receiver 702 and / or generating information for transmission by transmitter 706, a processor that controls one or more components of mobile device 700. And / or a processor that analyzes the information received by the receiver 702, generates information for transmission by the transmitter 716, and controls one or more components of the mobile device 700.

The mobile device 700 further includes a memory operatively coupled to the processor 706, which memory is associated with data to be transmitted, received data, information related to available channels, analyzed signal and / or interference strength data. Information relating to the assigned channel, power, rate, etc., and any other information suitable for communication over the channel can be estimated. Memory 708 may additionally store protocols and / or algorithms associated with estimating and / or using a channel (eg, performance based, capacity based, etc.).

The data store (e.g., memory 708) presented herein may be volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. By way of example, and not limitation, nonvolatile memory may include read only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable PROM (EEPROM), or flash memory. Volatile memory can include random access memory (RAM), which acts as external cache memory. By way of example, and not limitation, RAM may include synchronous RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), Synchlink DRAM (SLDRAM), and direct rambus. It may be provided in various forms such as RAM (DRRAM). Memory 708 of the present systems and methods is intended to include such memories and any other suitable type of memory, and is not limited to the presented memories.

The processor 706 may also be operatively coupled to a configuration information receiver 706 that may obtain parameters related to transmitting data over the wireless network. For example, as shown, configuration information may relate to codes and / or matrices that may be used to generate signals from data, where the final signals are transmitted in both the I and Q branches of the communication channel. . Mobile device 700 also includes a modulator 712 that can modulate the data into signals based on the configuration information as shown. For example, modulator 712 can apply codes and / or matrices (eg, Walsh codes or other codes / matrixes with good correlation characteristics) to the data to generate the signals.

In addition, mobile device 700 may include a scrambler 714 that can encode the signals for secure communication of the signals. As shown, for example, the scrambler 714 may additionally or alternatively use a complex scrambling code to cause some transmission of the signal on the I branch and other parts of the signal on the Q branch. . The mobile device also includes a transmitter 716 for transmitting signals to, for example, a base station, another mobile device, and the like. Although presented separately from the processor 706, the modulator 704, the configuration information receiver 710, the modulator 712, and / or the scrambler 714 may include a processor 706 or multiple processors (not shown). It should be understood that it may be part of it.

8 is an example of a system 800 that facilitates receiving signals from a mobile device over I and Q branches of a communication channel. System 800 includes a receiver 810 that receives signal (s) from one or more mobile devices 804 via a plurality of receive antennas 806, and one or more mobile devices 804 via a transmit antenna 808. A base station 802 (eg, an access point) having a transmitter 824 for transmitting to the network. Receiver 810 may receive information from receive antenna 806 and is operatively associated with a descrambler capable of decoding the received signal. In addition, demodulator 814 can demodulate received descrambled signals. The demodulated symbols are analyzed by processor 816, which may be similar to the processor described in connection with FIG. 7, and may include information relating to signal (e.g., pilot) strength and / or interference strength, A memory that stores data transmitted or received to mobile device (s) 804 (or a separate base station (not shown)) and / or any other suitable information related to performing the various operations and functions presented herein ( 818). Processor 816 is further coupled to configuration information designator 820 that can assign channel configuration information to one or more devices 804 and can send information to one or more devices 804.

According to an example, the descrambler 812 can decode the signals received through the I and Q branches to produce a single signal for demodulation. In yet another example, demodulator 814 can demodulate signals received through I and Q branches to determine data from mobile device 804. The configuration information designator 820 may send configuration information to the mobile devices 804 to force the mobile device 804 to use the I and Q branches for transmission / reception. As shown, transmitting data to / from the device over I and Q branches may distribute transmission power over the branches to mitigate I / Q imbalance. Also, although presented separately from processor 816, demodulator 814, descrambler 818, configuration information designator 820, and / or modulator 822 may be processor 816 or multiple processors ( It is to be understood that it can be part of).

9 shows an example wireless communication system 900. The wireless communication system 900 shows only one base station 910 and one mobile device 950 for simplicity. However, it will be appreciated that system 900 may include two or more base stations and / or two or more mobile stations, where additional base stations and / or mobile devices are described below. May be substantially similar to or different from). In addition, the base station 910 and / or the mobile device 950 may utilize the systems (FIGS. 1-4 and 7-8) and / or methods (FIGS. 5-6) presented herein to facilitate wireless communication therebetween. It will be appreciated that can be used.

At base station 910, traffic data for multiple data streams is provided from data source 912 to transmit (TX) data processor 914. According to one example, each data stream may be transmitted through each antenna. The transmit data processor 914 formats, codes, and interleaves the traffic data stream based on the particular coding scheme selected for that data stream to provide coded data.

Coded data for each data stream may be multiplexed with pilot data using Orthogonal Frequency Division Multiplexing (OFDM) techniques. Additionally or alternatively, the pilot symbols may be frequency division multiplexed (FDM), time division multiplexed (TDM), or code division multiplexed (CDM). Pilot data is a typical known data pattern that can be processed in a known manner and used in mobile device 950 to estimate the channel response. The multiplexed pilot and coded data for each data stream may be selected for a particular modulation scheme (e.g., binary phase shift keying (BPSK), quadrature phase shift keying (QPSK), M-phase shift keying (M) selected for that data stream. (PSK), M- quadrature amplitude modulation (M-QAM, etc.) may be modulated (eg, symbol mapped) to provide modulation symbols. Data rate, coding, and modulation for each data stream may be determined by instructions performed or provided by the processor 930.

Modulation symbols for the data streams may be provided to the transmit MIMO processor 920, which may further process the modulation symbols (eg, for OFDM). Transmit MIMO processor 920 then provides N _T modulation symbol streams to N _T transmitters (TMTR) 922a through 922t. In various embodiments, the transmit MIMO processor 920 applies beamforming weights to the symbols of the data streams and to the antenna from which the symbol is to be transmitted.

Each transmitter 922 receives and processes each symbol stream to provide one or more analog signals, and further modulated signals suitable for conditioning (e.g., amplifying, filtering, and upconverting) the analog signals for transmission on a MIMO channel. To provide. Also, N _T modulated signals from transmitters 922a through 922t are transmitted from N _T antennas 924a through 924t.

In mobile device 950, the transmitted modulated signals are received by N _R antennas 952a through 952r, and the received signal from each antenna 952 is provided to each receiver (RCVR) 954a through 954r. . Each receiver 954 conditions (eg, filters, amplifies, and downconverts) each signal, digitizes the conditioned signal to provide samples, and further processes the samples to produce a corresponding "receive" symbol stream. to provide.

RX data processor 960 receives the N _R of the received symbol streams from N _R receivers 954, and processes them based on a particular receiver processing technique to provide N _T of "detected" symbol streams. Receive data processor 960 may demodulate, deinterleave, and decode each detected symbol stream to recover traffic data for the data stream. The processing by receive data processor 960 is complementary to the processing performed by transmit MIMO processor 920 and transmit data processor 914 of base station 910.

The processor 970 may periodically determine the precoding matrix to use as described above. Further, processor 970 may form a reverse link message that includes a matrix index portion and a rank value portion.

The reverse link message may include various types of information about the communication link and / or the received data stream. The reverse link message is processed by the transmit data processor 938, modulated by the modulator 980, conditioned by the transmitters 954a through 954r, and transmitted to the base station 910, where the transmit data processor 938 ) Also receives traffic data for multiple data streams from data source 936.

At base station 910, modulated signals from mobile device 950 are received by antennas 924, conditioned by receivers 922, demodulated by demodulator 940, and receive data processor ( Extract the reverse link message processed by 942 and sent by the mobile device 950. In addition, the processor 930 may determine the precoding matrix to use to determine the beamforming weight by processing the extracted message.

Processors 930 and 970 may direct (eg, control, coordinate, manage, etc.) operation at base station 910 and mobile device 950, respectively. Each of processors 930 and 970 may be associated with memory 932 and 972 that store program codes and data. Processors 930 and 970 may also perform calculations to derive frequency and impulse response estimates for the uplink and downlink, respectively.

It should be understood that the aspects presented herein may be implemented by hardware, software, firmware, middleware, microcode, or a combination thereof. In a hardware implementation, the processing units may include one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing units (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), and processors. , Controller, micro-controller, microprocessor, other units designed to perform the functions presented herein, or a combination thereof.

When the present embodiments are implemented in software, firmware, middleware or microcode, program code or code segments, they may be stored in a machine readable medium such as a storage component. A code segment may represent a procedure, a function, a subprogram, a program, a routine, a subroutine, a module, a software package, a class, or any combination of instructions, data structures, or program statements. A code segment may be coupled to another code segment or hardware circuit by conveying and / or receiving information, data, arguments, parameters, or memory contents. Information, arguments, parameters, data, etc. may be communicated, forwarded, or transmitted using any suitable means, including memory sharing, message delivery, token delivery, network transmission, and the like.

In the case of a software implementation, the techniques presented herein may be implemented through modules (eg, procedures, functions, etc.) that perform the functions presented herein. The software codes may be stored in memory units and executed by processors. The memory unit may be implemented within the processor or external to the processor, where the memory may be communicatively coupled to the processor via various known means.

Referring to FIG. 10, a system 1000 for transmitting signals over I and Q branches is presented to reduce I / Q imbalance by distributing power across branches. For example, system 1000 may be at least partially present within a base station, mobile device, or the like. It will be appreciated that system 100 is presented as including functional blocks, which can be functional blocks that represent functions implemented by a processor, software, or a combination thereof (eg, firmware). System 1000 includes a logical grouping 1002 of electronic components that can operate together. For example, logical grouping 1002 may include an electronic component 1004 for generating a signal based at least in part on data to be transmitted. For example, such a signal may be generated by modulating the data using a code or matrix having good correlation characteristics, such as Walsh code or the like. In another example, when using the iterative transmission technique, one signal may be transmitted first through the I branch, followed by one signal through the Q branch, as described above. In addition, the logical grouping 1002 may include an electronic component 1006 for distributing signals through the I and Q branches of the communication channel. In this regard, the signal can be distributed or balanced across both I and Q branches to mitigate I / Q imbalance, as shown. In one example, the code or matrix provided to modulate the data may include real and complex modifiers to facilitate this operation as presented herein.

In addition, logical grouping 1002 may include an electronic component 1008 for applying a complex scrambling code that results in a signal for transmission on the I branch, resulting in a separate signal for transmission on the Q branch. Thus, for example, the scrambling code can additionally or alternatively be used to generate a signal transmitted over the I and Q branches. In addition, the logic group 1002 may include an electronic component 1010 for transmitting signals of the I and Q branches of the communication channel. Since the signal, and thus the signal power, is transmitted over both branches, I / Q imbalance can be mitigated as shown. The system 1000 may also include a memory 1012 that retains instructions for executing functions associated with the electronic components 1004, 1006, 1008, and 1010. Although shown as being external to memory 1012, it should be understood that one or more of electronic components 1004, 1006, 1008, and 1010 may exist within memory 1012.

Referring to FIG. 11, a system 1100 is provided for receiving signals transmitted over I and Q branches of a communication channel. System 1100 may reside within a base station, mobile device, or the like, for example. As shown, system 1100 includes functional blocks that can represent functions implemented by a processor, software, or a combination thereof (eg, firmware). System 1100 includes a logical grouping 1102 of electronic components that receives and interprets signals to determine data transmitted by the signals. Logical group 1102 may include an electronic component 1104 for receiving multiplexed signals related to the communication channel via I and Q branches. The multiplexed signals can include signals to / from the various wireless devices being transmitted / received, and the multiplexed signals are received to facilitate orthogonal communication. In addition, the logical grouping 1102 can include an electronic component 1106 for demultiplexing the multiplexed signals for the I and Q branches to produce a plurality of signals transmitted over the branches. For example, device signals can be separated between I and Q branches, so that the signal for a given device has both I and Q portions. In this regard, the logical grouping 1102 also includes an electronic component 1108 for demodulating at least one device signal from the I branch and at least one device signal from the Q branch to receive data sent by the device. It may include. Since signals can be transmitted in this manner, signal power for a given device can be distributed across the I and Q branches to mitigate I / Q imbalance.

The logical grouping 1102 may also include an electronic component 1110 for descrambling at least one device signal transmitted on the I branch and at least one device signal transmitted on the Q branch using a complex scrambling code. have. The electronic component 1100 can be used prior to demultiplexing the signal, as presented herein, if the received signal is scrambled. Thus, if a scrambling code is used to spread the signal over the I and Q branches, the electronic component 1110 may reverse the code to generate a device signal for demultiplexing. In addition, logical grouping 1102 is an electronic component 1112 for providing channel configuration information to at least one wireless device related to transmitting a portion of data over an I branch of a communication channel and transmitting the remaining portion over a Q branch. It may include. The wireless device may use this configuration information in transmitting signals over the wireless network as presented herein. The system 1100 may also include a memory 1114 that retains instructions for executing functions associated with the electronic components 1104, 1106, 1108, 1110, 1112. While shown as being external to memory 1114, it should be understood that one or more of electronic components 1104, 1106, 1108, 1110, 1112 may exist within memory 1114.

The foregoing includes examples for various embodiments. That is, it is of course not possible to describe any conceivable combination of components or methods for the purpose of describing such embodiments, but one of ordinary skill in the art will recognize that various additional combinations and substitutions are possible. Accordingly, the written description is intended to embrace all such alterations, modifications and variations that fall within the scope and spirit of the appended claims. In addition, the term "include" as used in the description or claims has a broad meaning in the claims, when used as a transition phrase, does not exclude other configurations similar to "comprising". In addition, although the elements of the aspects and / or embodiments presented herein are described and claimed in the singular, the plural forms may be contemplated, unless expressly stated in the singular. Also, unless stated otherwise, all or part of any aspect and / or embodiment may be used with all or part of any other aspect and / or embodiment.

Various example logic, logic blocks, modules, and circuits may be used in a general purpose processor; Digital signal processor, DSP; Application specific integrated circuits, ASICs; Field programmable gate array, FPGA; Or other programmable logic device; Discrete gate or transistor logic; Discrete hardware components; Or through a combination of those designed to implement these functions. A general purpose processor may be a microprocessor; In an alternative embodiment, such a processor may be an existing processor, controller, microcontroller, or state machine. A processor may be implemented as a combination of computing devices, such as, for example, a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or a combination of such configurations. In addition, the at least one processor may include one or more modules operable to perform one or more of the steps and / or operations presented herein.

The steps and algorithms of the methods described above may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. The software modules include random access memory (RAM); Flash memory; A read only memory (ROM); An electrically programmable ROM (EPROM); Electrically erasable programmable ROM (EEPROM); register; Hard disk; Portable disk; Compact disk ROM (CD-ROM); Or in any form of known storage media. An exemplary storage medium is coupled to the processor such that the processor reads information from, and writes information to, the storage medium. In the alternative, the storage medium may be integral to the processor. In addition, in some aspects such a processor and storage medium are located in an ASIC. In addition, the ASIC may be located in a user terminal. In the alternative, the processor and the storage medium may reside as discrete components in a user terminal. In addition, in some aspects, the steps and / or actions of the method or algorithm may be a computer readable medium and / or a set of codes and / or instructions on a machine readable medium or any thereof May be present in combination.

In one or more aspects, the functions presented herein may be implemented through hardware, software, firmware, or a combination thereof. If implemented in software, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes computer storage media and communication media including any medium for facilitating the transfer of a computer program from one place to another. A storage medium may be any available medium that can be accessed by a general purpose computer or a special computer. For example, such computer-readable media can be any program code means required in the form of RAM, ROM, EEPROM, CD-ROM or other optical disk storage media, magnetic disk storage media or other magnetic storage devices, or instructions or data structures. Include, but are not limited to, a general purpose computer, special computer, general purpose processor, or any other medium that can be accessed by a particular processor. In addition, any connecting means may be considered a computer readable medium. For example, if the software is transmitted from a website, server, or other remote source through wireless technologies such as coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or infrared radio, and microwave, such coaxial Wireless technologies such as cable, fiber optic cable, twisted pair, DSL, or infrared radio, and microwave may be included within the definition of such a medium. Disks and discs used herein include compact discs (CDs), laser discs, optical discs, DVDs, floppy disks, and Blu-ray discs, where the disks magnetically reproduce data, but the discs are optically To play the data. Combinations of the above should also be included within the scope of computer-readable media.

Claims (37)

A method for modulating data for in-phase / quad phase (I / Q) multiplexing,
Receiving configuration information related to a wireless communication channel;
Modulating data with one or more signals in accordance with the configuration information; And
Transmitting the signals on the I and Q branches of the communication channel. The method of claim 1,
And wherein said step of data modulation comprises mapping a portion of transmission data through said I branch and mapping the remaining portion of said transmission data through said Q branch. The method of claim 2,
Wherein a portion of the transmitted data over the I branch is substantially half of the data. The method of claim 2,
The configuration information comprises one or more orthogonal or quasi-orthogonal codes for modulating the data. The method of claim 4, wherein
Wherein the orthogonal or quasi-orthogonal codes comprise a real part and a complex part. The method of claim 2,
Some of the data mapped for transmission over the I branch corresponds to a first control channel that supports multiple input multiple output (MIMO) communication using multiple transport blocks to the device, and mapped for transmission over the Q branch. Data corresponds to a separate control channel associated with the first control channel. The method of claim 1,
And the signals are repeatedly transmitted over a plurality of partial time and frequency resources associated with the communication channel. The method of claim 7, wherein
And transmitting the signals comprises alternating transmissions over the I and Q branches for a given partial time and frequency resource. The method of claim 1,
The configuration information relates to a complex scrambling code for encoding signals. 10. The method of claim 9,
Scrambling signals using the complex scrambling code to facilitate sending signals over the I and Q branches of the communication channel. A wireless communication device,
At least one processor; And
A memory coupled to the at least one processor,
The at least one processor
Generate a transmission signal based at least in part on the received data;
Distribute the signal over the I and Q branches of the communication channel; And
And transmit the signal over the communication channel using the I and Q branches. A wireless communication device that facilitates alleviating I / Q imbalance in transmitting wireless communication signals, comprising:
Means for generating a signal based at least in part on data to be transmitted;
Means for distributing the signal over an I and Q branch of a communication channel; And
Means for transmitting signals of the I and Q branches of the communication channel. A computer program product comprising a computer readable medium, comprising:
The computer readable medium may
Code for causing at least one computer to determine configuration information related to a communication channel;
Code for causing the at least one computer to modulate data with one or more signals divided over an I and Q branch of the communication channel; And
And code for causing the at least one computer to transmit the signals on an I and Q branch of the communication channel. As a device,
A channel resource determiner for receiving configuration information related to one or more communication channels;
A data modulator for generating a signal for transmission through the I branch of the channel and a signal for transmission through the Q branch of the channel based at least in part on the configuration information; And
And a transmitter for transmitting the signals on the I and Q branches. The method of claim 14,
The configuration information includes a plurality of codes, and the data modulator applies the codes to data to generate a signal for transmission through the I branch and a signal for transmission through the Q branch. 16. The method of claim 15,
And the codes are one or more orthogonal or quasi-orthogonal codes to facilitate simultaneous transmission of the signals. 16. The method of claim 15,
The signal for transmission through the I branch relates to a portion of the data, and the signal for transmission through the Q branch relates to the remainder of the data. 16. The method of claim 15,
Wherein the signal for transmission over the I branch comprises substantially all of the data and the signal transmitted over the Q branch comprises substantially all of the data. The method of claim 18,
The transmitter transmits a signal for transmission over the I branch at some time and frequency resources associated with the communication channel, and transmits a signal for transmission over the Q branch at another discrete some time and frequency resource associated with the communication channel. Device. The method of claim 14,
The configuration information relates to a complex scrambling code for encoding a signal for transmission over the I branch. The method of claim 20,
And a signal scrambler that applies, to the signal for transmission through the I branch, a complex scrambling code that causes another separate signal for transmission through the Q branch. A method for facilitating evaluating communication channels based on a signal multiplexed across I and Q branches, the method comprising:
Receiving a multiplexed signal from a plurality of wireless devices related to a communication channel;
Separating the multiplexed signal into a portion received at an I branch and a portion received at a Q branch; And
Demodulating some portions received at the I branch and some portions received at the Q branch to generate data transmitted by one of the plurality of wireless devices over the communication channel. How to make it easier to evaluate. The method of claim 22,
Descrambling some portions received at the I branch and some portions received at the Q branch using a complex scrambling code. The method of claim 22,
Wherein said demodulation is performed using an orthogonal or quasi-orthogonal code having real and complex number characteristics. The method of claim 22,
Allocating channel resources to at least one of the plurality of wireless devices,
Wherein the channel resource comprises channel configuration information related to transmitting some of the channel data over an I branch and transmitting the remaining portion over a Q branch. The method of claim 25,
The channel configuration information relates to one or more orthogonal or quasi-orthogonal codes with real and complex parameters. The method of claim 25,
The channel configuration information relates to a complex scrambling code for encoding data transmitted over the channel. The method of claim 25,
A portion received at the I branch corresponds to a first control channel supporting multiple input multiple output communication, and a portion received at the Q branch corresponds to another separate control channel associated with the first control channel. To facilitate evaluating them. A wireless communication device,
At least one processor; And
A memory coupled to the at least one processor,
The at least one processor
Receive a multiplexed signal from a plurality of wireless devices over a communication channel;
Demultiplexing the multiplexed signal to determine a plurality of signals transmitted over I and Q branches of the communication channel, each associated with at least one of the plurality of wireless devices; And
And demodulate at least one signal transmitted through the I branch and at least one signal transmitted through the Q branch to determine data transmitted by at least one of the plurality of wireless devices. . A wireless communication device for receiving I / Q multiplexed signals, comprising:
Means for receiving multiplexed signals related to the communication channel via the I and Q branches;
Means for demultiplexing the multiplexed signals for the I and Q branches to produce a plurality of signals from the device transmitted over the branches; And
Means for demodulating at least one device signal from the I branch and at least one device signal from the Q branch to receive data transmitted by the device. A computer program product comprising a computer readable medium, comprising:
The computer readable medium may
Code for causing at least one computer to receive a multiplexed signal from a plurality of wireless devices associated with the communication channel;
Code for causing the at least one computer to separate the multiplexed signal into a portion received at an I branch and a portion received at a Q branch; And
To cause the at least one computer to demodulate some portions received at the I branch and some portions received at the Q branch in order to generate data transmitted by one of the plurality of wireless devices over the communication channel. A computer program product comprising code for doing so. As a device,
A receiver for receiving the multiplexed signal from a plurality of wireless devices related to the communication channel;
A demultiplexer for demultiplexing the I and Q branches of the communication channel to yield a plurality of signals transmitted in both I and Q branches; And
A demodulator for demodulating at least one of the plurality of signals transmitted in the I branch and at least one of the plurality of signals transmitted in the Q branch to determine data transmitted by one of the plurality of devices. , Device. 33. The method of claim 32,
And a descrambler for using the complex scrambling code to descramble at least one of the plurality of signals transmitted in the I branch and at least one of the plurality of signals transmitted in the Q branch. 33. The method of claim 32,
And the demodulator demodulates using one or more orthogonal or quasi-orthogonal codes. 33. The method of claim 32,
A channel resource allocator for providing channel configuration information to at least one of the plurality of wireless devices,
The configuration information relates to sending a portion of data over an I branch of the communication channel and transmitting the remaining portion over a Q branch of the communication channel. 36. The method of claim 35 wherein
The channel configuration information relates to one or more orthogonal or quasi-orthogonal codes with real and complex parameters. 36. The method of claim 35 wherein
The channel configuration information relates to a complex scrambling code for encoding data transmitted over the channel.

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